The change in seasons over course of a year is a good example of a circadian rhythm

Which of the following would NOT be an example of the dynamic systems theory?

A) Patricia's mom creates games that encourage her to crawl and to climb. B) Jeb's dad often buys new toys, then hides them for Jeb to find. C) Babette began crawling at seven months of age and was walking by her first birthday. D) Pillar and her brother watch television about an hour per day.

What term is used to describe a culture within a culture, based on ethnicity, class, region, or some other variable?

a. cross-culture b. social psychology culture c. cultural diversity d. subculture